Timing Chain Removal and Installation

TIMING CHAIN & SPROCKETS

REMOVAL





1. Disconnect battery negative cable.
2. Drain cooling system.
3. Remove Timing Chain Cover (1).

Timing Component Alignment Marks-5.7L:

4. Re-install the vibration damper bolt finger tight. Using a suitable socket and breaker bar, rotate the crankshaft to align timing chain sprockets and keyways as shown.

CAUTION: The camshaft pin and the slot in the cam sprocket must be clocked at 12:00 (2). The crankshaft keyway must be clocked at 2:00 (3). The crankshaft sprocket must be installed so that the dots and or paint marking is at 6:00.





5. Remove oil pump.





6. Retract tensioner shoe (1) until hole in shoe lines up with hole in bracket.





7. Slide a suitable pin (1) into the holes.





8. Remove camshaft sprocket attaching bolt and remove timing chain with crankshaft and camshaft sprockets (2).
9. If tensioner assembly is to be replaced, remove the tensioner to block bolts and remove tensioner assembly.

INSTALLATION





1. If tensioner (1) assembly is being replaced, install tensioner and mounting bolts. Torque bolts to 28 Nm (250 inch lbs.).
2. Retract tensioner (2) if required.

CAUTION: The timing chain must be installed with the single plated link aligned with the dot and or paint marking on the camshaft sprocket. The crankshaft sprocket is aligned with the dot and or paint marking on the sprocket between two plated timing chain links.

CAUTION: The camshaft pin and the slot in the cam sprocket must be clocked at 12:00. The crankshaft keyway must be clocked at 2:00. The crankshaft sprocket must be installed so that the dots and or paint marking is at 6:00.





3. Place both camshaft sprocket and crankshaft sprocket on the bench with timing marks on exact imaginary center line through both camshaft and crankshaft bores.
4. Place timing chain around both sprockets.
5. Lift sprockets and chain (keep sprockets tight against the chain in position as shown).
6. Slide both sprockets (2,3) evenly over their respective shafts and check alignment of timing marks.
7. Install the camshaft bolt. Tighten the bolt to 122 Nm (90 ft. lbs.) torque.





8. Remove tensioner pin. (1) Again, verify alignment of timing marks.





9. Install the oil pump.
10. Install the oil pan and pick up





11. Install the timing chain cover.
12. Refill engine oil.
13. Fill cooling system.
14. Connect battery negative cable.
15. Start engine and check for oil and coolant leaks.